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Be cautious with this tank retainer. I installed it on my 03 325i with the stock expansion tank (118k miles) and it leaked heavily from the expansion tank fitting where it did not before with the stock retainer. Figured the expansion tank o ring needed replaced and bought a brand new OEM unit. Installed it and was fine for a week or so but now is leaving small puddles every time I park the car. Will be replacing the part with an OEM retainer.

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Works OK

October 20, 2017

Reviewer:
Igor from Oakland, CA United States

Definitely not as well made as the OEM version, but it fit perfectly and so is working fine so far.

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BMW E46 3-Series Expansion Tank Retainer

May 9, 2017

Reviewer:
John Moroles from Bonney Lake, WA United States

After hours of remove and replace I was excited to get 50/50 antifreeze in tank again only to find that I had a leak. After going round and round trying to figure out where I had a leak it turned out quality control failed. The plug came from the factory (only part made in China too in my order) without a seal. I could tighten it but it would never seal. Hope to get my money back on that one. They're great customer support. I expect nothing less. Since it's designed to not come out I had to force it out to seal it. There may be a small piece of plastic floating somewhere in my cooling system. Ouch!

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Good Part.........

August 8, 2015

Reviewer:
William H. Caple III from Chandler, AZ United States

Everything seems to be of great construction. The fit was good too. The only thing I didn't hear the typical click when seating the Expansion Tank to the Retainer.

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Wasn't sure I needed - glad I bought it for sanity

March 10, 2015

Reviewer:
Trevor Vander from Melbourne, FL United States

Old one was brittle, could have retained it but this was cheap insurance since i was replacing every other component.